Corrugated-fiber-board box.



T. J. OORWIN,

CORRUGATED FIBER BOARD BOX.

APPLICATION FILED SEPT. 24,1912.

Patented May 19, 1914.

' UNITED STATES. PATENT OFFICE.

THORNTON J. CORWIN, OF SAN FRANCISCO, CALIFORNIA, ASSIG'NOR TO ILLINOIS-PACIFIC GLASS'CO., OF SAN FRANCISCO, CALIFORNIA, A CORPORATION OF CALI-FORN'IA.

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Specification of Letters Patent.

Application filed September 24, 1912. Serial No. 722,049.

Patented May 19, 19 14.,

To all whom it may concern Be it known that I, THORNTON J. .ponwrrr, acitizen of the United States, residing 1n the city and county of SanFrancisco and specification.

My invention relates to corrugated fiber-- board shipping boxes forglassware or fragile merchandise. I

To meet the demand for light-weight shipping cases for shipping heavy,fragile merchandise by freight, considerable difliculty has beenexperienced in making a fiberboard or paper shipping case which willhave sufficient strength and rigidity and at the same time protect thecontentsfrom breakage in transit. The present invention solves theproblem in a practical, economical manner. I Y

Having reference to the accompanying drawings, Figure 1 is a perspectiveof the box illustrating the invention. Fig. 2'is an enlargedcrosssection of the box material.

This invention consists of two or more layers A--A, of corrugatedfiber-board, placed face to face and on opposite sides of the centralbacking or sheet 2, to which central backing sheet 2 the corrugations ofthe sheets A-A' are firmly attached throughout their entire length bysome suitable adhesive preparationythen over each of the cor-- A-A' issecured an outside rugated layers finishing sheet 3 of stifiishsurfacing and material. 3-3 make a double sheet of great rigidity andstrength suitable for box purposes and at the same time give an enhanceddegree of resiliency and elasticity so as to reduce. the liability tobreakage or other injury of the contents.

Owing to thethickness of the double cor- These.five sheets A, A, 2 andWitnesses:

I rugated layers, with the single intermediate backing 2 and facingsheets 3, and in order to secure. a square corner on the box when theflaps are folded into place, it is found that 'in practice theoldrstyleof crease or score would not answer. Therefore, I originated awide crease, indicated at 5, equal in width to the thickness of thecorrugated board, so, that when the panels constituting the flaps ofthe-box are bent at right angles,- the folded parts will easily ad ustthemselves to one another without breaking the creased portions orbending orbulging the sides of the box. a

Having thus described my invention, wha

I claim and desire to secure by Letters Patent is- As a new article ofmanufacture, corrugated fiber-board for shipping boxes and the like,composed ofa central base sheet, a corrugated sheet on each face of saidbase sheet and secured thereto, and a facing sheet disposed over andsecured to each corrugated sheet, each of the corrugated sheets, atintervals, having several of the corrugations straightened out so as toprovide flattened parts which are uninterrupt'edly secured to oppositefaces of the base sheet and which in turn have the respective facingsheets uninterruptedly secured to said flattened parts,

whereby hinge connections of five-ply and THORNTON J. CORWI/N.

Jonas H. We, EMMA B. BRU.

